import axios from 'axios'
import { MessageBox, Message } from 'element-ui'
import store from '@/store'
import { getToken } from '@/utils/auth'
import router from '../../router';

// create an axios instance
const service = axios.create({
  //baseURL: process.env.VUE_APP_BASE_API, // url = base url + request url
  // withCredentials: true, // send cookies when cross-domain requests
  headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
  timeout: 50000 // request timeout
})

let _insertActionRegexp=new RegExp("post")
let _updateActionRegexp=new RegExp("post")
// request interceptor
service.interceptors.request.use(
  config => {
    console.log(config, "config");
    if(_insertActionRegexp.test(config.method) || _updateActionRegexp.test(config.method)){
      config.transformRequest=[]
    } else {
      config.transformRequest=[function (data) {
          let ret = ''
          for (let it in data) {
            ret += encodeURIComponent(it) + '=' + encodeURIComponent(data[it]) + '&'
          }
          return ret
        }]
    }
    
    // do something before request is sent
    if (store.getters.token) {
      // let each request carry token
      // ['X-Token'] is a custom headers key
      // please modify it according to the actual situation
      config.headers['Authorization'] = getToken()
    }
    return config
  },
  error => {
    // do something with request error
    console.log(error) // for debug
    return Promise.reject(error)
  }
)

// response interceptor
service.interceptors.response.use(
  /**
   * If you want to get http information such as headers or status
   * Please return  response => response
  */

  /**
   * Determine the request status by custom code
   * Here is just an example
   * You can also judge the status by HTTP Status Code
   */
  response => {
    const res = response.data
    // if the custom code is not 20000, it is judged as an error.
    if (res.code < 0) {
      Message({
        message: res.msg || 'Error',
        type: 'error',
        duration: 5 * 1000
      })

      // 50008: Illegal token; 50012: Other clients logged in; 50014: Token expired;
      if (res.code === 50008 || res.code === 50012 || res.code === 50014) {
        // to re-login
        MessageBox.confirm('You have been logged out, you can cancel to stay on this page, or log in again', 'Confirm logout', {
          confirmButtonText: 'Re-Login',
          cancelButtonText: 'Cancel',
          type: 'warning'
        }).then(() => {
          store.dispatch('user/resetToken').then(() => {
            location.reload()
          })
        })
      }
      return Promise.reject(new Error(res.msg || 'Error'))
    } else {
      return res
    }
  },
  error => {
    let msg = "请求失败,请检查网络或者联系管理员 !";
    if(error&&error.request&&error.request.status==401){
      msg = '登录已过期，请重新登陆';
      // 可以做跳转到登录页
      router.push({ path: "/login" });
    }
    if(error&&error.request&&error.request.status==400){
      msg = '请求异常，请联系开发人员！';
    }
    console.log('err' + error) // for debug
    Message({
      message: msg,
      type: 'error',
      duration: 5 * 1000
    })
    return Promise.reject(error)
  }
)

export default service
